The nitriding process begins at the surface of the part with the formation of a compound (aka white) layer, which depends to a large extent on the composition of the steel (in particular, the carbon content).

It is most interesting to note that the process technology of gaseous nitride is still being used in today’s surface-treatment processing world.

The Doctor has always been fascinated with anything involving case hardening. Gas nitriding is no exception; a seemingly old and well-established technology that changes so little that it begs the question, “What’s new?” Well, as it turns out, quite a bit. Let’s learn more.